Ethyl 2-(m-tolyl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazole-3-carboxylate CAS 2416673-84-0
| CAS No. | 2416673-84-0 |
| Molecular Formula | C16H18N2O2 |
| Molecular Weight | 270.33 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Ethyl 2-(m-tolyl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazole-3-carboxylate (CAS 2416673-84-0), molecular formula C16H18N2O2 and molecular weight 270.33 g/mol, is a CATO reference standard with documented purity and traceability.
Ethyl 2-(m-tolyl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazole-3-carboxylate (C16H18N2O2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C16H18N2O2 |
| Molecular Weight | 270.33 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2000 |
| Nitrogen Atoms | 2 |
Recommended Standards
- Ethyl 2-({4-hydroxythieno[2,3-d]pyrimidin-2-yl}sulfanyl)acetate (CAS 383146-85-8)
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- Ethyl 1-phenyl-4,5,6,7-tetrahydro-1H-indazole-3-carboxylate (CAS 93019-39-7)
- Ethyl 3-amino-4-(benzylamino)benzoate (CAS 848819-86-3)
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- N-(2-Cyanoethyl)-N-isopropylbenzo[c][1,2,5]thiadiazole-4-sulfonamide (CAS 312742-08-8)
- Methyl 2-(4-methoxy-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)acetate (CAS 944317-65-1)
- Tert-butyln-(2-methyl-5-oxo-pyrrolidin-3-yl)carbamate (CAS 1824602-08-5)
- tert-Butyl 4-(3-bromopropyl)benzoate (CAS 126931-33-7)
- (Z)-5-((5-bromofuran-2-yl)methylene)-3-cyclohexyl-2-thioxothiazolidin-4-one (CAS 292034-08-3)
- Des-Pro36-37-Tirzepatide (CAS CATO-CPTD788938)
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